Gate for swinging bridges



(No Model.)

J. SVAGINA 85 J. RADL. GATE FOR SWINGING- BRIDGES. I

Patented Feb. 15; 1887.

V Ill/IIIIIIII I,

-gii" N. PETERS. Pholn-L'rthagraphon Wailxinglnn. D. c.

UNITED STATES PATENT OFFICE.

JOHN SVACINA AND JOHN RADL, OF MANITOVVOG, WISCONSIN.

.GATE FOR SWINGING BRIDGES.

SPECIFICATION forming part of Letters Patent No. 357,796, dated February15,1887.

Application filed Nove,n1ber 23,1886. Serial No. 219,673. (No model.)

To ctZZ whom it may concern.-

Be it known that we, JOHN SVAOINA and JOHN RADL, of Manitowoc, in thecounty of Manitowoc, and in the State of Wisconsin, have inventedcertain new and usefullmprovcments in Gates for Swinging Bridges; and wedo hereby declare that the following is a full, clear, and exactdescription thereof.

Our invention relates to gates for swinging bridges; and it consists incertain peculiarities of construction and combination of parts, to behereinafter described, with reference to the accompanying drawings, andsubsequently claimed.

In the drawings, Figure 1 represents a plan view, partly in section, ofa bridge provided with our gate; Fig. 2, a vertical longitudinal sectionthrough one of the bridge-abutments, showing the gate up; Fig. 3, apartial section of the abutment, showing the bridge closed,

both of the sectional views being taken on line a: 00, Fig. 1, and Fig.4: an elevation of the abutment, showing the gate up, the bridge beingopen.

Referring by letter to the drawings, A represents an abutment, and B aswing-bridge. Operative in the frame-work of the abutment A, beneath theroadway O, is a vertical shaft, D, that has keyed thereto at its upperend a rack-pinion, E, provided with a perforation, a, to engage a stud,I), on an angle-plate, F, the latter having oneend thereof fulcrumed atc to a timber of said abutment, and the other end connected to a spring,G, that is in turn fastened at d to another of such timbers.

The lower end of thevertical shaft 1) has keyed thereto a miter-wheel,e, that meshes ber, M, of the abutment, and have their up per endsterminated in brackets k, the latter being bolted or otherwise securedto the timbers N on each side of the roadway.

Each end of the swing-bridge B is provided with a rack-plate, O, toengage the pinion E on the vertical shaft D, and thereby communicatemotion to the horizontal shaft H, and this latter part in turn, by itsdisk-and-pitman connection I J, serves to operate the gate.

\Vhen the bridge is swung around away from the abutment A, theraek-and-piniongear above described sets the shafting in motion, andthereby causes the gate K to rise above the roadway of said abutment,and by the time the rack O has passed out of mesh with the pinion E theperforation or seat a in the latter will have come into register withand received the stud b on the angle-plate F, that is forced up by thespring G, and thus a lock is formed to hold said gate in its elevatedposition and prevent the same from being forced down by accident or.design. As the bridge swings home it will come first in contact with theangle-plate F, and by its weight overcome the resistance of the spring Gand depress said platesufficiently to withdraw the stud b thereon fromthe perforation or seat in the pinion E, thus leaving the latter freefor the action of the rack O, and by the time this return movement ofsaid bridge is completed the gate K will have been run down to itsnormal position below the roadway of the abutment.

Although we have only illustrated one end I of a bridge provided withour invention, it is obvious that a similar construction would beemployed at the other end of said bridge.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is-

The combination of a swing-bridge having its ends provided withrack-plates, vertical shafts having their bearings in thebridgeabutments, pinions keyed to the shafts to mesh with therack-plates and provided with perforations or seats, horizontal shaftsgeared to said vertical ones and provided with crankdisks,vertically-sliding gates arranged in said abutments, pitnien connectingthe disks and ,woc, in the county of Manitowoc and State of gates, andspring-plates havingstuds arranged Wisconsin, in the presence of twowitnesses.

to automatically engage the perforations or JOHN SVAGINA. seats-in therack-pinion, substantially as set JOHN RADL. 5 forth. Witnesses:

In testimony that we claim the foregoing T. W. HOGAN,

we have hereunto set our hands, at Manito- JOHN FRANZ, Jr.

